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The Testament of Sherlock Holmes Hints
How can I make a strong enough sedative?
1 of 7: Look on the shelves that are to the left of the grilled window to find a syringe and a bottle of barbiturate acid that you can take.
2 of 7: Watson comments that barbiturate acid is often used as a tranquilizer, so go to inventory and drag-and-drop the syringe onto the acid bottle to fill it.
3 of 7: That's not enough by itself, though. You'll need to find something to add to the acid in the syringe to make it more effective.
4 of 7: Remember all those sleeping opium addicts out in the hallway? Perhaps a bit of opium would do the trick.
5 of 7: Look on the floor to find two large bowls full of opium balls. Click on either bowl to take a spoonful of them.
6 of 7: You'll then need to heat the opium balls until they form a liquid solution.